package cn.kunakun;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader; 

public class code {

private static final String LL = "Decompiling this copyrighted software is a violation of both your license agreement and the Digital Millenium Copyright Act of 1998 (http://www.loc.gov/copyright/legislation/dmca.pdf). Under section 1204 of the DMCA, penalties range up to a $500,000 fine or up to five years imprisonment for a first offense. Think about it; pay for a license, avoid prosecution, and feel better about yourself.";  

public String getSerial(String userId, String licenseNum) {  

  java.util.Calendar cal = java.util.Calendar.getInstance();  

  cal.add(1, 3);  

  cal.add(6, -1);  

  java.text.NumberFormat nf = new java.text.DecimalFormat("000");  

  licenseNum = nf.format(Integer.valueOf(licenseNum));  

  String verTime = new StringBuilder("-").append(  

    new java.text.SimpleDateFormat("yyMMdd").format(cal.getTime()))  

    .append("0").toString();  

  String type = "YE3MP-";  

  String need = new StringBuilder(userId.substring(0, 1)).append(type)  .append("300").append(licenseNum).append(verTime).toString();  

  String dx = new StringBuilder(need).append(LL).append(userId)   .toString();  

  int suf = this.decode(dx);  

  String code = new StringBuilder(need).append(String.valueOf(suf))   .toString();  

  return this.change(code);  }  

private int decode(String s) {  

  int i;  

  char[] ac;  

  int j;  

  int k;  

  i = 0;  

  ac = s.toCharArray();  

  j = 0;  

  k = ac.length;  

  while (j < k) {  

   i = (31 * i) + ac[j];  

   j++;  

  }  

  return Math.abs(i);  

}  

private String change(String s) {  

  byte[] abyte0;  char[] ac; int i;  int k;  int j;  

  abyte0 = s.getBytes();  

  ac = new char[s.length()];  

  i = 0;  

  k = abyte0.length;  

  while (i < k) {  

   j = abyte0[i];  

   if ((j >= 48) && (j <= 57)) {  

    j = (((j - 48) + 5) % 10) + 48;  

   } else if ((j >= 65) && (j <= 90)) {  

    j = (((j - 65) + 13) % 26) + 65;  

   } else if ((j >= 97) && (j <= 122)) {  

    j = (((j - 97) + 13) % 26) + 97;  

   }  

   ac[i] = (char) j;  

   i++;  

  }  

  return String.valueOf(ac);  

}  

public code() {  

  super();  

}  

public static void main(String[] args) {  

  try {  

   System.out.println("please input register name:");  

   BufferedReader reader = new BufferedReader(new InputStreamReader(  

     System.in));  

   String userId = null;  

   userId = reader.readLine();  

  code myeclipsegen = new code();  

   String res = myeclipsegen.getSerial(userId, "5");  

   System.out.println("Serial:" + res);  

   reader.readLine();  

  } catch (IOException ex) {  

  }  

}  

}